Yes, same thing for me, and also for all the snippets reports (FAQ, sitelink etc...), while coverage report is stuck on 7th of january, showing no loss of valid pages.Guys I checked my webmaster tool for the websites that got hit and all websites have in the "mobile app usability" section lost all page since 7 January. Many websites passed from 500 pages to 10-15 pages, without any errors. Did you see also this for your websites that got hit?